CODEWITHSUNDEEP
c++ifstreamgetlineseekg
rluks
rluks

Reputation: 2862

Why seekg does not work with getline?

Seekg does not seem to work, when I reach EOF in myFile. 

ifstream myFile("/path/file");
for(int i; i < 10; i++){
    myFile.seekg(0);//reset position in myFile
    while(getline(myFile, line)){
        doSomething
    }
}

So, now I am opening input stream every loop:

for(int i; i < 10; i++){
    ifstream myFile("/path/file");//reset position in myFile
    while(getline(myFile, line)){
        doSomething
    }
}

But I would rather seek to position 0. How can I achieve that?

Upvotes: 9

Views: 4149

Answers (1)

Joseph Mansfield
Joseph Mansfield

Reputation: 110748

Make sure you clear the error flags before the call to myFile.seekg():

myFile.clear();

After the EOF flag has ben set, you will not be able to extract anything. You have to clear those flags to be able to extract again.

Upvotes: 15

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